From: Linus Torvalds Date: Thu, 12 Sep 2013 19:40:15 +0000 (-0700) Subject: vfs: use __getname/__putname for getcwd() system call X-Git-Tag: v3.12-rc1~30 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3272c544da48f8915a0e34189182aed029bd0f2b;p=pandora-kernel.git vfs: use __getname/__putname for getcwd() system call It's a pathname. It should use the pathname allocators and deallocators, and PATH_MAX instead of PAGE_SIZE. Never mind that the two are commonly the same. With this, the allocations scale up nicely too, and I can do getcwd() system calls at a rate of about 300M/s, with no lock contention anywhere. Of course, nobody sane does that, especially since getcwd() is traditionally a very slow operation in Unix. But this was also the simplest way to benchmark the prepend_path() improvements by Waiman, and once I saw the profiles I couldn't leave it well enough alone. But apart from being an performance improvement (from using per-cpu slab allocators instead of the raw page allocator), it's actually a valid and real cleanup. Signed-off-by: Linus "OCD" Torvalds --- Reading git-diff-tree failed